Model: 1478

Safety Relief Valve

Properties:

Pipe Size Accommodated

0.750 inches 1st end

Pipe Size Accommodated

0.750 inches 2nd end

Thread Direction

Right-hand 2nd end

Thread Direction

Right-hand 1st end

Flow Control Device

Disk

Bonnet Type

Inside spring

Bonnet Attachment Method

Integral

Disk Loading Method

Spring

Maximum Operating Temp

406.0 degrees fahrenheit single response

Connection Style

G46b plain (pipe) 2nd end

Connection Style

G9 plain, optional en (pipe) 1st end

Valve Operation Method

Automatic

Connection Type

Threaded external pipe 2nd end

Connection Type

Threaded internal pipe 1st end

Features Provided

Bonnet packing

Thready Qty Per Inch (tpi)

14 1st end

Thready Qty Per Inch (tpi)

14 2nd end

Adjustable Pressure Range

+5.0/+300.0 pounds per square inch

Maximum Operating Pressure

300.0 pounds per square inch single response

Thread Size

0.750 inches 1st end

Thread Size

0.750 inches 2nd end

Opening Pressure Setting

5.0 pounds per square inch

Material

Copper alloy

Thread Series Designator

Npt 2nd end

Thread Series Designator

Npt 1st end

NSN

4820-00-967-1027

Part Number

1478

Description

Valve,safety Relief

CAGE

02750

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes valve (1), relief, pressure and temperature.

Part 1478 NSN 4820-00-967-1027

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05488

FIIG:

A046B0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

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Schedule B and Export

Schedule B: 8481400000
SITC: 74740
End Use: Industrial machines, other
NAICS: 332911
USDA: 1

Freight Class: Safety or relief valves